Designed by adventurers, for adventurers, this lambswool beaniewill be an essential in your gear bag. Named for the rocks whichclimbers love to boulder in Vermont! Size: Adult regular fit, One Size fits most. Also fits Juniors and Teens. Machine knit 80% Lambswool/20% Nylon blend. Fine and soft, the wool has both odor-resistant and hypoallergenic properties and is great at retaining warmth. Fully-lined with 100% polyester Comfort Plush for extra soft comfort and protection from the elements. Classic striped style and high quality design. Goes great with any winter or cold weather outfit.